package com.ymj.provider.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringContextUtils implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtils.applicationContext = applicationContext;
    }

    /**
     * 通过名称获取bean
     * @param name bean名称
     * @return bean实例
     */
    public static Object getBean(String name)  {
        return applicationContext.getBean(name);
    }


    /**
     * 通过class获取Bean.
     *
     * @param clazz bean类型
     * @param <T> 泛型参数
     * @return bean实例
     */
    public static <T> T getBean(Class<T> clazz) {
        return applicationContext.getBean(clazz);
    }

    /**
     * 通过name,以及Clazz返回指定的Bean
     *
     * @param name bean名称
     * @param clazz bean类型
     * @param <T> 泛型参数
     * @return bean实例
     */
    public static <T> T getBean(String name, Class<T> clazz) {
        return applicationContext.getBean(name, clazz);
    }
}
